ACERACEAE. [Vor.. II. 
g. Acer Negando I. Box Elder. Ash-leaved 
Maple. (Fig. 2380.) 
Acer Negundo I,. Sp. Pl. 1056. 1753. 
Negundo aceroides Moench, Meth. 334. 1794. 
Negundo Negundo Karst. Deutsch. Fl. 596. 1880-83. 
A tree with maximum height of 60°-70° and trunk diam- 
eter of 2°-3%4°. Leaves petioled, pinnately 3-5-foliolate; 
leaflets ovate or oval, pubescent when young, nearly gla- 
* brous when old, 2/5’ long, 1/-3’ wide, dentate, slightly 
lobed or sometimes entire, acute or acuminate at the apex, 
rounded, or the terminal one somewhat cuneate at the 
base; flowers dioecious, drooping, very small, appearing a 
little before the leaves; samaras glabrous, slightly in- 
curved, 1/-114’ long, the broad wing finely veined. 
Along streams, Vermont and Ontario to Manitoba, south to 
Florida, Texas, Mexico and New Mexico. Rare near the At- 
Jantic Coast. Wood soft, weak, creamy white; weight per 
cubic foot 27 lbs. Used for woodenware and paper pulp. 
Locally called Sugar Maple. April. 
Acer Pseido-Platanus I,., the Sycamore Maple, with terminal drooping racemes of yellowish 
flowers with very woolly ovaries, and deeply 3-5-lobed leaves, and Acer platanoides L., the Norway 
Maple, with terminal corymbs of greenish yellow flowers appearing with or before the sharply 
5-7-lobed leaves, are commonly planted, and occasionally escaped from cultivation in the east. 
Family 68. HIPPOCASTANACEAE Tw SciGe ISIN: AS 172502 6 1838. 
BUCKEYE FAMILY. 
Trees or shrubs, with opposite petioled digitately 3~-9-foliolate leaves, and 
conspicuous polygamous irregular flowers in terminal panicles. Calyx tubular or 
campanulate, 5-lobed or 5-cleft in the following genus, the lobes unequal. Petals 
4-5, unequal, clawed. Disk entire, often 1-sided. Stamens 5-8; filaments elon- 
gated. Ovary sessile, 3-celled; ovules 2 in each cavity; style slender. Capsule 
leathery, globose or slightly 3-lobed, smooth or spiny, 3-celled or by abortion 1- 
2-celled, and often only 1-seeded. Seeds large, shining; cotyledons very thick. 
The family consists of the following genus, containing about 15 species, natives of America 
and Asia, and &illia, of Mexico, which differs from A /sculus in having distinct sepals. 
1. AESCULUS L. Sp. Pl. 344. 1753. 
Characters of the family. [Ancient name. ] 
Capsule spiny, at least when young; stamens exserted. 
Flowers white, mottled with yellow and purple; leaves abruptly acuminate. 
1. AE. Hippocastanum. 
Flowers yellow. 
A tree; leaflets 5-7, pubescent. 2. AE. glabra. 
A shrub; leaflets 7-9, glabrate. 3. ALE. arguta. 
Capsule glabrous; stamens not exceeding the petals. 
Corolla yellow, or purplish; calyx oblong; a tree. 4. AE. octandra. 
Corolla red; calyx tubular; a shrub. 5. AE. Pavia. 
1. AEsculus Hippocastanum L,. 
Horse-chestnut. (Fig. 2381.) 
AEsculus Hippocastanum I,. Sp. Pl. 344. 1753. 
A large tree, reaching a maximum height of 
about I00° and a trunk diameter of 6°, the buds 
very resinous. Leaves long-petioled, pubescent 
when young, glabrate when mature, or with per- 
sistent tufts of hairs in the axils of the veins on 
the lower surface; leaflets 5-7 (occasionally only 3 
on some leaves) obovate, 4/-8’ long, abruptly 
acuminate at the apex, cuneate-narrowed to the 
base, irregularly crenulate-dentate; flowers white, 
blotched with red and yellow, inflorescence rather 
dense, often 1° long, the pedicels and calyx can- 
escent; stamens exserted; fruit globose, prickly. 
Escaped from cultivation, southeastern New York 
and New Jersey. Native of Asia. Called also Bon- 
gay, and the fruit, in children’s games, Conquerors. 
June-July. 
